Use correct default subscription id to get default network template.

- when launching the app info page and no network template is defined in
the launch arguments, use the correct default data subscription id to
check whether mobile network template should be used or not.

Change-Id: If9341abf3416c775a2b7407c1d6d0b33f4aad67f
Fixes: 120098637
Test: make RunSettingsRoboTests

src/com/android/settings/datausage/AppDataUsage.java

@@ -26,6 +26,7 @@ import android.graphics.drawable.Drawable;
 import android.net.NetworkTemplate;
 import android.os.Bundle;
 import android.os.UserHandle;
+import android.telephony.SubscriptionManager;
 import android.util.ArraySet;
 import android.util.IconDrawableFactory;
 import android.util.Log;
@@ -88,7 +89,8 @@ public class AppDataUsage extends DataUsageBaseFragment implements OnPreferenceC
     private CycleAdapter mCycleAdapter;
 
     private List<NetworkCycleDataForUid> mUsageData;
-    private NetworkTemplate mTemplate;
+    @VisibleForTesting
+    NetworkTemplate mTemplate;
     private AppItem mAppItem;
     private Intent mAppSettingsIntent;
     private SpinnerPreference mCycle;
@@ -108,7 +110,7 @@ public class AppDataUsage extends DataUsageBaseFragment implements OnPreferenceC
                 : null;
         if (mTemplate == null) {
             mTemplate = DataUsageUtils.getDefaultTemplate(mContext,
-                    DataUsageUtils.getDefaultSubscriptionId(mContext));
+                    SubscriptionManager.getDefaultDataSubscriptionId());
         }
         if (mAppItem == null) {
             int uid = (args != null) ? args.getInt(AppInfoBase.ARG_PACKAGE_UID, -1)